S
M
T
W
T
F
S
30
84°
55°
31
84°
54°
1
84°
52°
2
81°
54°
3
80°
51°
4
82°
50°
5
78°
47°
6
75°
47°
7
75°
46°
8
76°
50°
9
74°
47°
10
73°
46°
11
74°
50°
12
79°
51°
13
80°
44°
14
73°
43°
15
71°
42°
16
70°
42°
17
71°
43°
18
73°
42°
19
74°
44°
20
71°
46°
21
77°
47°
22
78°
48°
23
78°
49°
24
77°
49°
25
78°
48°
26
77°
48°
27
78°
45°
28
75°
45°
29
70°
44°
30
66°
45°
1
67°
44°
2
68°
44°
3
69°
34°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Highlands Ranch
Highlands Ranch's September 2026 forecast shows daily high temperatures ranging from 66° to 84°, with overnight lows between 34° and 55°. The average high for September is 75° with an average low of 47°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how September weather will actually feel in Highlands Ranch. See also: October | November | December.
